Question by : heat modifications difficulties?
one. A small metal block with mass of 80. g is heated in an oven to 110. C. It is then instantly taken and positioned in an insulated liquid bath containing 300. g of water at 12. C. Following 30 minutes, the temperature of the bath is 16. C . What is the heat capability of the metal block?
two. A 50. g thermometer with a particular heat of .twenty kcal/kg C and with an initial reading of 21.two C was placed in make contact with with a 320. g insulated water bath. Minutes right after, the temperature reading on the thermometer went to 48.9 C . What was the first temperature of the water before the thermometer was positioned? Did the presence of the thermometer impact the temperature of the object being measured? Explain.
3. Assuming that the precise heat of coffee and water is the exact same, how considerably cold water at 10.0C need to be added to a one hundred. ml cup of coffee at 80 c to decrease its temperature to 45. c
4. How significantly water at 30. C is required to bring down the temperature of a one. kg lead shots at first at 180. C to 50. C? (Clead = 130 J/kg C)
5. A 150. g 500. mL Pyrex beaker was left outdoors a winter evening at -5. C . It was then taken inside the residence, filled up to the brim with water at 15. C and was place within an insulated Styrofoam box. What would be the last temperature of the water in the beaker following it stabilized? (Cpyrex= 840 J/kg C)
6. A twenty. g baking pan produced of aluminum was utilized to bake a cake at 375. C. If the baking pan is immersed in a one. kg water bath at space temperature 27. C, (ignoring the impact of the water bath container) what would be the equilibrium temeprature of the two objects? (cal – 910 J/kg C)
7. A light bulb lit for numerous hrs was turned off. The ten. g glass of the light bulb was at first at 150. C . What was the amount heat released by the glass when it attained a area temperature of 25. C ? (Cglass=840 J/kg C)
eight. A 500. g of wood specimen is initially cooled to a temperature of 1. C for preservation. The specimen is then taken out of the fridge to be thawed and be ready for dissection. the area temperature of the laboratory is 25. C . Calculate the sum of heat that can be absorbed by the wood from the environment. (Cwood = 1700 J/kg C)
9. What quantity of copper that is initially at 150. C shold be placed in get in touch with with a 1. kg water that is initially 30. C, to raise its temperature by three. C ? (Ccu = 390 J/kg C)
10.Thermometers have a temperature limit. Many common thermometers are only limited to 60. C. To measure the temperature inside an oven employing a widespread thermometer, an alternative procedure was devised. A 2. kg iron block was placed within the oven. Right after an hour of exposure to the heat supply, the iron block was placed in a 5. kg water bath at first at 27.. Minutes following, the equilibrium temperature was study by the thermometer to be 38.6 C. What is the temperature inside the oven? Cfe = 470 J/kg C
Thank you in advance, you can answer just a few.
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